I’d put the FG in a white dress, since the basket’s white I think it’d look weird with an ivory dress. A brown sash would look pretty, and tie it well. You could also pull the aqua in, in her sash, hair piece, or even mix in some colored petals if you can find them. Or add some aqua ribbon to the basket.

The ivory flowers should look great, I wouldn’t change them unless they’re really dark and you’re not happy with them.